QA1 Strut Rod Locking Nut Issue

You could just use you original struts and add a Heim end. They thread right on. That is what most race car builders did in the past. Make them stronger yourself for less money. Never buy another piece.

8" of flat stock and 2 heims.

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Ahh, there it is!

That same K frame you didn't build. Tiny cross sectional area on the K frame, less torsional resistance than a factory K would have for street driving. 100% drag race only application.

The permanent attachment of the tabs also doesn't allow any adjustment on the clocking of the heims, which is necessary to adjust for the ride height of the car and keep the heims within their misalignment range. Fine for a drag race only car with little front end travel, not at all a good idea on a street car where the ~5.5" of travel will have the heim cycle from one edge of its misalignment angle to the other as it moves through the whole range of travel. If you've actually set up a strut rod like that, adjusting the clocking on the heim and making sure it doesn't run out of misalignment angle is part of setting up the length of the strut rods and checking for any binding in the suspension.

That's not a street worthy set up, certainly not for a handling application.